| package org.apache.cassandra.concurrent; |
| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| |
| import org.apache.cassandra.Util; |
| import org.apache.cassandra.utils.concurrent.WaitQueue; |
| import org.junit.*; |
| |
| import java.util.concurrent.ThreadLocalRandom; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import static org.apache.cassandra.utils.concurrent.WaitQueue.newWaitQueue; |
| import static org.junit.Assert.*; |
| |
| public class WaitQueueTest |
| { |
| |
| @Test |
| public void testSerial() throws InterruptedException |
| { |
| testSerial(newWaitQueue()); |
| } |
| public void testSerial(final WaitQueue queue) throws InterruptedException |
| { |
| final AtomicInteger ready = new AtomicInteger(); |
| Thread[] ts = new Thread[4]; |
| for (int i = 0 ; i < ts.length ; i++) |
| ts[i] = NamedThreadFactory.createAnonymousThread(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| WaitQueue.Signal wait = queue.register(); |
| ready.incrementAndGet(); |
| try |
| { |
| wait.await(); |
| } catch (InterruptedException e) |
| { |
| e.printStackTrace(); |
| } |
| } |
| }); |
| for (Thread t : ts) |
| t.start(); |
| final ThreadLocalRandom random = ThreadLocalRandom.current(); |
| while (ready.get() < ts.length) |
| random.nextLong(); |
| for (Thread t : ts) |
| queue.signal(); |
| for (Thread t : ts) |
| { |
| Util.joinThread(t); |
| assertFalse(queue.getClass().getName(), t.isAlive()); |
| } |
| } |
| |
| @Test |
| public void testCondition() throws InterruptedException |
| { |
| testCondition(newWaitQueue()); |
| } |
| public void testCondition(final WaitQueue queue) throws InterruptedException |
| { |
| final AtomicBoolean ready = new AtomicBoolean(false); |
| final AtomicBoolean condition = new AtomicBoolean(false); |
| final AtomicBoolean fail = new AtomicBoolean(false); |
| Thread t = NamedThreadFactory.createAnonymousThread(new Runnable() |
| { |
| @Override |
| public void run() |
| { |
| WaitQueue.Signal wait = queue.register(); |
| if (condition.get()) |
| { |
| System.err.println(""); |
| fail.set(true); |
| ready.set(true); |
| return; |
| } |
| |
| ready.set(true); |
| wait.awaitUninterruptibly(); |
| if (!condition.get()) |
| { |
| System.err.println("Woke up when condition not met"); |
| fail.set(true); |
| } |
| } |
| }); |
| t.start(); |
| final ThreadLocalRandom random = ThreadLocalRandom.current(); |
| while (!ready.get()) |
| random.nextLong(); |
| condition.set(true); |
| queue.signal(); |
| Util.joinThread(t); |
| assertFalse(queue.getClass().getName(), t.isAlive()); |
| assertFalse(fail.get()); |
| } |
| |
| } |